TDI, better MPG from hard acceleration?

[Rango318]

Cobb, I still drive like an old man to a point, I take off hard, but still only do about 49 in a 55. I found that my OBD reader shows 40-45mpg at 55, but shows 50-55mpg at 48.

[oldtamiyaphile]

Originally Posted by Rango318

oldtamiyaphile, I'll keep that in consideration. I figure even if it isn't the most accurate, I still have something to look at and keep me motivated to get better numbers.

I just filled up my 4th tank on my TDi, my first tanks were my usual foot to the floor approach, which netted me 9l/100km.

On the third tank I went with the 80% load method (which is really slow in my case), SGII promised 8.4l/100km, but the fill up was a disapointing 9. My best to worst tank so far have only been 0.2 apart.

If I can't evaluate different driving styles with it, SG and others are of limited use as a diesel saving device IMO.

[JasonG]

It seems you are also getting the turbo spoiled up higher which helps mpg.
It is critical that if you eco drive a diesel that it gets a good hard "Italian tune up" regularly to keep the VNT from freezing up.

[Rango318]

JasonG, I have never heard of an Italian tune up, so i had to look it up. Took me straight to TDIforum. That seems to be about how I drive now so I'll just keep doing it. I know my Torque app isn't correct, but I like seeing 53mpg on my 26 mile drive home from work.

[mcbota]

I try to use the same briskly method of acceleration, since I have discovered this website, but I cannot understand how can be done this under the 2000 rpm. If I have to use around 80% throttle method, then I will reach around 2800 rpm, before I will change the gear, because I cannot accelerate briskly starting form low rpm! So how do I have to do?

[Rango318]

Mcbota, when I accelerate, I don't keep it under 2000 rpms when I am driving this way. My car usually shifts around 3.5k-3.8k under hard take off. If I am taking off slowly, the way I use to, it would shift around d 2k.

[mcbota]

I was thinking that even if I have to do briskly/hard acceleration, some are saying to not go above 200rpm, and I didnt understand how is this possible!)))

[ecomodded]

My car makes full torque at 1900rpm so 80% load is somewhere under that.

I have a fuel pump tuning box hooked up between my fuel pump and ECU that gives my car snappy acceleration , making the 1st 1/2" of throttle powerful & energetic on my tdi.


Shift fast , stay in each gear for 2 seconds or so.

[mcbota]

I have made also a chiptuning to my car, an economical one, but I am afraid to accelerate briskly under 1800 rpm, to not provoke some lugging!

[j12piprius]

Originally Posted by mcbota

I try to use the same briskly method of acceleration, since I have discovered this website, but I cannot understand how can be done this under the 2000 rpm. If I have to use around 80% throttle method, then I will reach around 2800 rpm, before I will change the gear, because I cannot accelerate briskly starting form low rpm! So how do I have to do?

That is the same for me. The EX has higher rpms than other models of civic.

I just watch the % engine load, speed, instant and trip mpg.